EP 0604255 B1 19960821 - Hydraulic motor piston
Title (en)
Hydraulic motor piston
Title (de)
Hydraulikmotorkolben
Title (fr)
Piston de moteur hydraulique
Publication
Application
Priority
FR 9215491 A 19921222
Abstract (en)
[origin: EP0604255A1] In a hydraulic motor including a cylinder bounded by a first cylindrical surface (26), the invention relates to a piston (30) sliding within the cylinder, and exhibiting a second cylindrical surface (33-34) located facing the first cylindrical surface, the piston having a groove (36) receiving a sealing member (37) located between this piston and the first cylindrical surface, the second cylindrical surface of the piston comprising first (33) and second (34) parts located on either side of the groove (36), the first part (33) exhibiting radial dimensions (D26) of the first cylindrical surface (26) and constituting a guide element, and the second part (34) exhibiting radial dimensions (D34) which are less than those (D26) of the first part (33). According to the invention, a second cylinder (28) is formed in the cylinder block and has radial dimensions (D28) less than those (D26) of the first cylinder, and the piston comprises a second piston body (31) mounted so that it can slide in the second cylinder, constituting a complementary element for guiding the sliding. One application is the production of an efficient engine having a reduced manufacturing cost. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
F03C 1/0406 (2013.01); F16J 9/00 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0604255 A1 19940629; EP 0604255 B1 19960821; DE 69304184 D1 19960926; DE 69304184 T2 19970605
DOCDB simple family (application)
EP 93402920 A 19931220; DE 69304184 T 19931220